Agitating device.



W. LINDSAY.

AGITATING DEVICE.

APPLICATION FILED AUG.30. ISI?.

1,267,562. Patented May 28,1918.

)IIIIIII WILLIAM LINDSAY, OF CHICAGO, ILLINUIS.

AGITATING DEVICE.

Specification of Letters Patent.

Patented May 28, 1918.

Application led August 30, 1917. Serial No. 188,951.

To all whom it may concern:

Be it known that I, WILLIAM LINDSAY a citizen of the United States, residin at Chicago, in the county of Cook and tate of Illlnois, have invented certain new and useful Improvements in Agitating Devices,of which the following is a description, reference being had to the accompanyin drawings, forming a part of this speci cation, in which correspondin numerals of reference in the different gures indicate like parts.

The object of my invention enerall stated, is to provide a simple, novel and e fective means for imparting a gyratory or shaking motion to a sieve, structure or container for the purpose more especially of sifting or screening comminuted materials, such, for example, as molders sand, enameling and other powder, cement, flour or the like, or for agitating an structure containing any substance, liqui or compound.

A further object is to so construct said device that the gyratory stress or force may be absorbed directly by the load and not by the structure or frame by which it may be supported or suspended.

While it is old in various instances and ways to suspend gyrator structures so as to be free to swing in mid-air from one or more points of suspension, I have discovered that "the manner of applying the gyratory force thereto is of the utmost importance if satisfactory results are t0 be produced. If applied to the structure in a positive way so that the driven gyratory element is relied upon to positively control the extent and character of the movement, regardless of load variations, or the relatlve proportions between the load and the actuating force, the noise and jar, as well as the power required, will be excessive, the effectiveness of the device impaired and its period of usefulness shortened.

If the structure to be agitated be suspended from a single point and the gyratory force applied between that point and the load, it has been found necessary to make the suspending frame rigid in order to transmit movement throu h it to the load; in which case, experience as demonstrated that if a sufficiently high speed be applied to the gyratory element (usually an unbalanced weight upon a vertical shaft) to produce eli'ective agitation, the metal frame will be caused to crystallize and will soon become useless. My main purpose, therefore, is to overcome these obJections by supplying novel agitatin means and so appl ing it as to cause the oad, per se, to direct y absorb the stress or shock; or, in other words, to coact with the gyratory element to establish a rhythmic movement between the two, thereby establishing a gyratory relation adapted to be automatically varied in conformity to load variations and resulting in economy of power while eliminating undue noise and jar and preventing injurious stress upon any of the coacting parts.

Again, it is my purpose to dispense with the use of a shaft and unbalanced weight, which necessitates a frame rigid with the sifter, -and in lieu thereof, to provide a gyratory motor element so constructed and arranged as to permit the sifter to be suspended from one or more points and upon one or more flexible elements, so that the gyratory character of the stresses may be varied when desired to produce a compound movement, such, for example, as a wabbling or oscillatory gyration of the load in addition to an orbital movement around the axis of suspension and to vary the degree of said wabbling action so as to render the device more eective in the treatment of different materials.

I accomplish said objects generally by freely supporting or preferably suspending in mid-air the structure to be agitated and connecting therewith a motor which shall be so mounted within the structure that its body as an entirety, may be caused to rotate upon an axis eccentric to the axis of the motor so as to produce an agitation or gyratory movement of the load, the extent and character of which may vary in proportion to the relative speed and weight of the motor, the relative point or points of suspension. the length of the suspending element, the weight of the load and the angle of variance, 1f any, between the axis of rotation of the motor casing and the gyratory axis or orbit of the load; all of which is hereinafter more particularly described and definitely pointed out in the claims.

In the drawings,

Figure 1, is an elevation of a suspended frame havin a screen thereon. shown in section, toget er with my improved gyratory motor-member,

lll)

rows there shown,

;. Fig., 4 islam enlarged :centralvertricalseo-t l pivotal ffas gu-y support; nigialy ersehen wthsfauial The ngttng or gyratory element-con- Q- ming wenn wichin when @embedded metal contact rings 21 and 22, both of which are concentric with-the axis of the journals l5. 4The rings l and 22, respectively, are connected by means of leads 23 and 24 wich a source of electric energy not shown. Sald rleads,,rmpperly insulated, are-fe Tried-011twardly throu h one of the"t es 2 and thelcefupwrrdy A'Along one of the chains 5, as shown in Fig. 1 to said source. Brackets or arms 25 andmrig; euren-gian atradhed to theesing 14 und provi sa ywith brunes-2*( 'and es frm the nner or -wnibh a lead' 29 is nredled Wih the fof 'e 'frd-mnt "B0 'wiinifthefmotor Y`rfnsrg; which 'fld iis connected 't ,3'1 Wi'h' bfsh 32, infcoiimerwth-a menesteres 'on' a roissy ennemie 134; A nre brush is borinecred V"tlI'rlg-:h 'a l-hd B6 *wiiifhe Ebrsh T2?, 'rherbx "crn Iet'r ".tlle ircixtif the "usuel Way hb the ld.`

Bling #rarement -w'iil "be imprima t he 130 sieve suiiicient to successively cause a considerable slack in each suspending chain. During the instant of such yielding action, the weight,v being supported by the other two chains, the centrally pivoted Suspending member `6 is depressed upon one side, while the slack of the chain upon the other allows that side to tilt upwardly in conformity to the wabbling or oscillatory movement of the sieve. The pivotal movement of the part 6 tends to neutralize the Shak ing action upon the suspending member 8 and the jar incident to the gyratory movement of the motor frame is absorbed, as it shouldbc, by the load. l

For purposes of coarse screening it may be found desirable to increase the wabbling action of the sieve. This may be accomplished by tilting the eccentric axis of the motor frame at an angle to the axis of suspension of the sieve.

As shown in Figs. l and 2 the axis of suspension of the sieve and the axis of the motor member coincide. By tiltin the casing so that the plane of its upper ace may be oblique to that of the horizon or, which would amount to the same thing, by tilting the body of the motor within said casing, so that the axis of the motor body may be at an angle oblique to a horizontal plane, the wabbling action of the sieve may be increased to any desired degree without lessening the ratory orbit around the axis of the load, J uch a construction is illustrated in Fig. 6 1n which the casing 42 corresponding to the casin 3 in the other views, instead of being rigidly attached `directly to the frame menibers-Z'isjointedly attached as shownat 43 to a lug 44upon the under side of a plate 45 to which the frame member 2 is rigidly attached. An adjusting screw 46, connected at one end to the part 45 throughaswiveled. connection 47, is tapped into a lug 48 upon said casing so that the casing 42 and with it the axis of the' motor bod within, maybe inclined at any `desired ang e to the plane of the part 45.

In Fig, 5 `I have shown a modified construction more especially adapted for the sifting of very line and heavy powders such for example as lead oxids, in which the casing 49 containing the gyratory motor is extended upwardly through the body of the sieve so as to apply the gyratory force as nearly as possible in the horizontal lane of the load, thereby avoiding the wabb in action described while maintaining the or ital movement.

I do not wish to be limited to the exact construction shown inasmuch as it may be varied without departing from the spirit of the invention; nor do I wish to be limited to electrical energy for actuating the motor.

Having thus described my invention, I claim:

1. A device of the character described, comprising, in combination a freely movable structure, a motor mounted thereon upon an axis eccentric to the axis of the body of said motor, and means interposed between the motor shaft and said structure and opera tively connected with them for imparting rotary motion to said motor body.

2. An agitating device, comprising, in combination, a structure supported to permit free movement thereof, a motor having its frame rotatively mounted upon said structure upon an axis eccentric to that' of said frame and operative connecting means between said motor frame and structure to cause rotation of said motor frame for imparting a gyratory movement to said structure.

3. An agitating device, comprising, in combination, a structure freely supported to permit it to be moved around a given axis, an electric motor having journals arranged eccentric to the axis of its frame, said journals being mounted in bearings in the structure, an armature shaft and gears for operatively connecting said shaft with said structure, whereby the rotation of the motor upon said eccentrlc axis may serve to impart a gyratory movement to said structure.

4. A device of the class described, comprising, in combination a structure freely supported to permit it to move around a given axis, an electric motor having its frame rotatably mounted upon said structure upon an axis eccentric to the axis of said frame but substantially concentric with that of said structure and means interposed between the motor shaft and said structure for imparting rotary motion to said motor frame around said eccentric axis.

5. A device of the class described, comprising, in combination, a structure to be agitated, flexible means for suspending the same to permit it to swing in an orbit around a vertical axis while free to take a different motion in addition to that of said orbital movement, an electric motor having its frame rotatably mounted upon said structure upon an axis eccentric to the axis of said frame, said frame being so adjusted with reference to said structure as to cause a wabbling action of the latter, and means in operative connection with the motor shaft and structure for imparting a rotary movement to said motor frame around said eccentric axis.

6. An agitating device, comprising, in combination, a structure freely suspended by flexible means to permit a compound gyratory movement thereof, an electric motor having its frame or casing rotatably mount ed upon said structureupon amaxis eccentric to that of said frame and means in iop erativeaeonnection with themotorfshaft for imipartingfrotary ymovement to said moton framefthe relation ofthe frame to the structurebeingsuchas to impart a wabbling movement Ito the latterin addition to that around said axial center.

7 Amagitating device comprisinga struci ture supported to permit free movementin ani orbit around a gwen axes andan electric motor operatively connected with theetruci ture and having its casing journaled in said structure 'upon an'. eccentric axis to cause rotation rof said motor casing upon said body, `the armature of said motor beingain.

operative connection with said structure to cause: rotation Aof themotorbody uponi said eccentricA axis rfor imparting a gylatory movement toeaid structurer 10.1AnV 4agitating wdevice comprising 'la structure supported vto permita movement' thereof finlan torbitl around.v a given :axis and anlelectmcmotor ]ournaledi=n said structure uponfan axis eccentric to that ofthe motor body; ythe armature of said motor'being in operative' connection 'with-said structure to cause rotationiof said motorA body uponeaid' eccentric faxisl afer imparting y ya fgyratory movement` to; fsaid structureg a portion iat;

least 19t lsaidi `motor body. ,f being y,below #the levelfofV` said structure. l

11i .Ari fagiiiatingiedevice; comprisimgefa structure. supported to vpermit i free xmevea 2 ment jin annorbit around, a fixedpaxispandxa' secondaryf movement in .addition thereteg' an*` 50 electric `motor operacivelyconnectedy with the structure and ham-ing` itsJcasingmjour-w naled in saidcstruetfuraupon an-eccentric axis to 1 caueefnotation of isaid motor casiraew4 uponsaid axis; and means-fomadjusting 4said 55 axis at an angle oblique to saidsxedeaxis forV causing a Wabblin'g movement of said 1. structurein addition to the crhi-talfmove-r ment thereof around. said xedf axiswy i 12, .Anmgitatingf device, comprising a 60 structure Ysupportedatov permit, free imovef, ment around the axis OLSupport, anelectrie motor ljournaled ini said structure upon an axis eccentric to the axis. of thebody ofmaid motor, and a vstationary gear upon said structure concentnic With'the armature shaftf and in operativey engagement with a gear.y upon said shaft.

13. In. a gyratory structure, the combination with -a movably supported elementto be agitated, ofwa driving element'comprising anelectric motor rotatably mounted upon. saidi mov-abiyfi @supported element, Y ,upon l a common axis, the axis ofl yfthe rotorifofsaid driving element; being iarranged-- eccentrial 57 5 cally tatheaxis .offsabd movaby supported.r element rand in,y operative 1 connection there` E with'to impart a oratorymovementtflfuereto.'+y

14. einY aagjitatingi device, comprising fa freely-movable-structure, a motor journaled 80 insaid structure upon an axis eccentric tofi thatfof the motor body, a motor shaftcom centric with said bodyand interposed gears, for operatively.L connecting: the Seme l with saidy freely movable `:structures In testimony whereoil have signedithis) specification in thev resenceyof two..suh. scriping'rgvitnesses, this QSthIdayeoffAagqst/, 191

WIIJLIJAMLLNDSY.

Witnessesa, n

DAVID HrFmenERW, JENNm L..F1sig1:i..

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